Improvement in metallurgic gas-furnaces



4 Sheets--Sheet1.

l. M. HARTMAN. Metallurgicj Gas-Furnaces.

Patented July 22,1873.

WITNESSES v INVENTUR 4 SheBt's Sh-eet 2.

l. M. HARTMAN'. Metallurgic Gas-Furnaces. o. 141,002.

Patented July 22,1873.

wlmzssts INVENTOR J ufl UNITED STATES PANT JOHN M. HARTMAN, OFPHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO TAWS & HARTMAN, OF SAME PLACE.

IMPROVEMENT lN METALLURGIC GAS-FURNACES.

Specification forming part of Letters Patent No. 141,002, dated July 22,1873; application filed April 15, 1873.

.To all whom it may concern:

of Pennsylvania, have invented an Improved Gas-Burner for Puddling andother Furnaces,

of which the following is a specification:

The object of the invention is the economical burning of furnace-gasesby their intimate mixture with air, either heated or cold, in contactwith or in the presence of heated brickwork or other fire-proofmaterial. When heated air is employed it is caught by pipes located inthe discharge-opening of a hot-blast oven, boiler setting, puddling,heating, or other furnace, and returned to mix with the gas.

Figure l is a side elevation of the valve chamber, air-pipe chamber, andgas-passage. Fig. 2 is a sectional view of Fig. 1. Fig. 3 is a top orplan view of Fig. 1. Fig. 4 is a reduced side elevation, partlysectioned, of the valve chamber, air-pipe, and gas chamber, brick-workand boiler-setting. Fig. 5 is a reduced end View of the valve-chamber,and the air-pipe and gas-chamber. Fig. 6is aperspective view, showingthe brick-work through which the air and gas pass instead of impingingon it. It can be employed instead of that shown in Fig. 1.

A is a case or pipe holder and gas-chamber, and B is a connection oropening to the interior of it. 0 (J are pipes placed lengthwise in thechamber A. Their outlet ends have fire-proof tips D, to protect themfrom the heat; or movable ends can be used, to be replaced when renderedworthless from the same Their inlet ends have the flanges a, by whichthey are bolted to the outside of the case or chamber, so as to beeasily withdrawn and replaced when burned or otherwise renderedinoperative. E E are fly-valves at the inlet ends of the air-pipes forregulating the quantity of airpassing through them. F is a valve overthe dust-opening of the chamber. G is a valve-chamber on the nozzle orconnection B of the chamber A. They are bolted together at their flangesb c, to be easily separated when required. H is a conical blowshut valvein the chamber G. It is suspended from the end of the arm I of the shaftJ. Its lugs or projections d prevent it from tilting or cooking whenclosing. K is a lever or handle on the end of the shaft J. c e arepin-holes in the side of the chamber G. The valve H opens by its ownweight. Its degree of opening is evinced by the inclination of thelever. The pin f prevents the lever from dropping when the valve is inits adjusted position. The bearings of the shaft J are made perfectlytrue and tight to prevent the escape of gas. L, Fig. 2, dotted linesFig. 3, is a fender, which depends from the upper part of the chamber A.It protects the valve H from the heat of the burning gas in the frontpart of the chamber.

Gas from the puddling or other furnace passes through the valve-chamberG into the chamber A, thence to its front, where it mixes with air(either heated or cold) issuing from the pipes G, and combustion takesplace. The air and gas impinge on the heated brick-work M in front ofthe pipes, whereby the combustion is increased and intensified. Beforeadmitting gas to the chamber A the brick-work M can be heated by anymeans, the easiest be ing to burn wood upon or against it.

In Fig. 6 the brick-work is shown with openings through which the gasand air can be passed and be more perfectly combined;

I do not confine myself to brick-work of any particular construction;nor do I confine myself to a given material for constructing the bridgeM. Any fire-proof material will serve the purpose.

If there is not sufficient heat in the walls of the chamber A toignite'the gas when it is first admitted, an explosion usually occurs,which is not confined to the chamber. The gas in the fiues becomesfired, and also explodes, causing great destruction. The slidevalveusually employed cannot be closed in time to prevent'an explosion in thefiue's.

When an explosion occurs in a gas-burner using the valve H it isimmediately blown shut, and is held in place by the pressure in thechamber A, until the gas is burned. The valve closing on its seat shutsoff all communication between the chamber and the fines,

and thereby prevents the gas in the said fines from being fired.

The valve H, by its tapering or conical formation, throws off all dustand dirt which falls through the fines onto the surface of the valve,and which would impair its working if it was allowed to deposit.

The construction of the boiler N for generating steam, and the way ofapplying the flame to it, do not enter into the invention.

I do not confine myself to the valve H, but claim, broadly, a valvewhich is closed by the explosive force of the gases in a gasburner, toprevent the gases in the flues from being fired.

I claim as my invention- 1. The gas-chamber A, in combination with theair'pipes O, and the breast'or brick work M, substantially for thepurpose shown and described.

2. The gas-chamber A of a gas-burner, in combination with the balance orblow-shut valve H, for the purpose shown and described.

3. The valve H, constructed with a conical or tapering back, andavalve-seat hearing or ring, as and for the purpose shown and described.

4. The chamber A and G, constructed separately, and bolted or otherwisesecured to gether by their flanges b c, substantially as and for thepurpose shown and described.

5. The valve H, arm I, shaft J, lever K, the openings 0, and the pin f,as and for the purpose shown and described.

6. The depending fender L, in combination with the chamber A, for thepurpose shown and described.

7. The chamber A, in combination with the pipes O, as shown anddescribed.

'8. The chamber A, pipes (l, and the valves E, as and for the purposeshown and described.

9. The pipes G, in combination with the fireproof tips 1), for thepurpose shown and described.

In testimony whereof I hereunto sign my name in presence of twosubscribing witnesses.

J UHN M. HARTMAN.

Witnesses EDMUND P. CooHRAN, FRANCIS D. Pnsronrus.

